Appli-Thane® 7340

W/mK 1.00

Because they are hard and high modulus after cure, many aerospace epoxy systems will fail when exposed to extreme thermal cycling and vibration environments. Designed as replacement material for these systems, Appli-Thane® 7340 is an easy-to-use polyurethane. It won’t harm, bend or break highly fragile substrates, such as glass and ceramic, when exposed to vibration and extreme thermal cycling. A thixotropic, thermally conductive compound, Appli-Thane® 7340 passes NASA’s outgassing requirements and is suitable for electronic bonding and staking and may be used as a fillet as well.

Uncured

Work Life @ 25°C

1.5 hours

Viscosity @ 25°C

Paste

Shelf Life @ -40°C

6 Months

Cure Options

1.5 hours @ 74°C + 72 hours @ 25°C7 days @ 25°C

Color

Dark Gray

Shore A Hardness

92

Shore D Hardness

45

Glass Transition Temp (°C)

-70

Density (g/cc)

2.3

Lap Shear 2024T3 Clad (psi)

1,300

Tensile Strength (psi)

900

Tensile Modulus (psi)

7,500

Elongation (%)

20

Storage Modulus (psi)

4,000

Electrical Properties

1.5 hours @ 74°C + 72 hours @ 25°C

Dielectric Constant

5.3 @ 10 kHz5.1 @ 100 kHz4.9 @ 1 MHz

Dissipation Factor

0.032 @ 10 kHz0.028 @ 100 kHz0.023 @ 1 MHz

Dielectric Strength (volts/mil)

480

Volume Resistivity (ohm-cm)

1.0E 15 @ 500 VDC

Thermal Properties

1.5 hours @ 74°C + 72 hours @ 25°C

CTE below Tg (ppm/°C)

50

CTE above Tg (ppm/°C)

121

Glass Transition Temp (°C)

-70

Operating Temp. Range (°C)

-100 to 125

Thermal Conductivity (W/mK)

1.0

Outgassing Properties

Based on cure of 1.5 hours @ 74°C

TML (%)

0.13

CVCM (%)

0.01

WVR (%)

0.05

Acoustic Properties

Velocity (m/s)

1,437

Impedance (MRayles)

3.36

Loss (dB/cm-MHz)

-13.2

Density (g/cc)

2.3

Key Features

Thixotropic

Thermally Conductive

Electrically Insulative

Semi-flexible

Superior Thermal Cycling

Hydrolytic Stability

Long Pot Life

Low Glass Transition Temperature

Low Modulus

Meets NASA Outgassing Requirements

Solvent Resistant

The data contained herein is provided for informational purposes only and are believed to be reliable. APPLI-TEC does not guarantee suitability of this product for any resultant application or freedom from patent infringement. Furthermore, APPLI-TEC disclaims any liability for incidental and consequential damages of any kind including but not limited to lost profits.